#hint-block {
    position: fixed;
    height: 2rem;
    line-height: 2rem;
}

#hint-block input {
    background: #fff;
    width: 4rem;
    height: 2rem;
    margin: 0 0.5rem;
}

#hint-block label {
    display: inline-block;
    background: #999999;
    color: #000;
    height: 2rem;
}